Keio 9000 series
8-car set 9701 in November 2021
In service	2001–present
Manufacturer	Nippon Sharyo, Tokyu Car Corporation
Replaced	6000 series
Constructed	2000–2009
Entered service	24 January 2001
Number built	264 vehicles (28 sets)
Number in service	264 vehicles (28 sets)
Formation	8/10 cars per trainset
Fleet numbers	9701–9708 (8-car sets) 9730–9749 (10-car sets)
Capacity	141 (end cars), 152 (intermediate cars)
Operators	Keio Corporation
Depots	Takahatafudō and Wakabadai
Lines served	KO Keio Line KO Keio Sagamihara Line KO Keio Takao Line S Toei Shinjuku Line
Specifications
Car body construction	Stainless steel
Car length	20 m (65 ft 7 in)
Width	2,845 mm (9 ft 4 in)
Height	4,100 mm (13 ft 5 in)
Doors	4 pairs per side
Maximum speed	110 km/h (68 mph) on Keio Corporation lines, 75 km/h (47 mph) on Toei Shinjuku Line
Traction system	Hitachi 2-level VVVF (IGBT switching device)
Traction motors	Hitachi 3-phase squirrel-cage induction motor
Power output	170 kW (228 hp) x4 per motored car
Acceleration	2.5 km/(h⋅s) (1.6 mph/s) (Keio Line) 3.3 km/(h⋅s) (2.1 mph/s) (Toei Shinjuku Line)
Deceleration	4.0 km/(h⋅s) (2.5 mph/s) 4.5 km/(h⋅s) (2.8 mph/s) (emergency)
Electric system(s)	1,500 V DC
Current collector(s)	Overhead
Braking system(s)	Electronically controlled pneumatic brakes with regenerative braking
Safety system(s)	ATC, Digital-ATC
Multiple working	7000 series, 6000 series
Track gauge	1,372 mm (4 ft 6 in)

The Keio 9000 series (京王9000系) is an electric multiple unit (EMU) train type in Japan, operated by the private railway operator Keio Corporation since 2001 on the Keio Line and its branches in Tokyo and Kanagawa Prefecture.^[1]

Variants

• 9000 series: original 8-car sets (9701-9708)
• 9030 series: 10-car sets (9730-9749) for use on Toei Shinjuku Line inter-running services from 2006

• 
  10-car set 9730

Operations

9000 series

The 9000 series 8-car sets are used mainly on the Keio Line, the Takao Line, and the Sagamihara Line. These sets are mainly used on Local services during daytime. They are also used on 10-car Special Express and Rapid trains. Sets are coupled to 2-car Keio 7000 series sets to form 10-car trains.^[1]

9030 series

The 9030 series 10-car sets are used primarily on inter-running services to and from the Toei Shinjuku Line.^[1]

Design

The front end design is based on the design of the Keio 5000 series. The body is made of stainless steel.^[2] While most of the sets were built at Nippon Sharyo, some were built at Tokyu Car Corporation.^{[citation needed]} The front portion is made of steel painted ivory white.^{[citation needed]}

The 9030 series sets differ from the earlier 8-car sets in having UV-cutting glass for the wide windows, eliminating the need for roller blinds, and having full-colour LED destination indicator panels.^[1]

• 
  Exterior destination panel

Formations

As of 1 April 2013, the fleet consists of eight 8-car 9000 series sets and twenty 10-car 9030 series sets.^[2]

8-car 9000 series

The 8-car 9000 series sets (9701 to 9708) are formed as shown below, with four motored (M) cars and four non-powered trailer (T) cars, and with car 1 at the western end.^[2]

• Cars 3, 6, and 7 each have one single-arm pantograph.^[2]
• Cars 2 and 7 have a wheelchair space.^[2]

10-car 9030 series

The 10-car 9030 series sets (9730 to 9749) are formed as shown below, with five motored (M) cars and five non-powered trailer (T) cars, and with car 1 at the western end.^[2]

• Cars 2, 3, 6, 8, and 9 each have one single-arm pantograph.^[2]
• Cars 2, 5, 7, and 9 have a wheelchair space.^[2]

Interior

Passenger accommodation consists of longitudinal bench seating throughout.^[1] Priority seats are provided at the end of each car.^[2]

• 
  9000 series interior
• 
  9000 series seating
• 
  Priority seats of a 9000 series set
• 
  9000 series LED passenger information display
• 
  9030 series interior
• 
  Priority seats of a 9030 series set
• 
  9030 series seating
• 
  Driver's cab, February 2013

Special liveries

From 1 November 2018, 9000 series set 9731 was wrapped in a pink livery incorporating several Sanrio characters, such as Hello Kitty.^[3]